They are RBC's i.e. red blood cells.
More than 95 percent of the protein in a red blood cell is hemoglobin. Hemoglobin is a protein that binds to oxygen and transports it throughout the body.
hemoglobin
Hemoglobin carries oxygen to the body's tissues. It is found in erythrocytes.
hemogoblin
Red blood cells transport oxygen from the lungs to the rest of the body.
Red blood cells, also known as erythrocytes, transport oxygen in the body. These cells contain hemoglobin, a protein that binds to oxygen in the lungs and releases it to tissues throughout the body.
Oxygen is transferred to the cells by our red blood cells which have a special molecule called hemoglobin inside. The hemoglobin molecule binds to the oxygen molecule and the reb blood cells transports the oxygen to wherever it is needed.
A blood cell carries oxygen by binding it to hemoglobin, a protein found in the red blood cells. Hemoglobin has a high affinity for oxygen, allowing it to efficiently transport oxygen from the lungs to the tissues throughout the body.
Red blood cells are a major cell component of blood responsible for carrying oxygen. They contain hemoglobin, a protein that binds to oxygen in the lungs and transports it to tissues throughout the body.
Red Blood Cells (RBCs) have hemoglobin. Hemoglobin picks up oxygen, like giving a piggy-back ride. The RBCs in the blood circulate throughout the body.
The description matches that of a red blood cell, also known as an erythrocyte. These cells have a biconcave disc shape, lack a nucleus, and are filled with hemoglobin to carry oxygen to tissues in the body through the circulatory system.
The Active transport